PR: 1833
authorDr. Stephen Henson <steve@openssl.org>
Thu, 26 Aug 2010 14:23:52 +0000 (14:23 +0000)
committerDr. Stephen Henson <steve@openssl.org>
Thu, 26 Aug 2010 14:23:52 +0000 (14:23 +0000)
Submitted By: Robin Seggelmann <seggelmann@fh-muenster.de>

Support for abbreviated handshakes when renegotiating.

CHANGES
ssl/d1_clnt.c
ssl/d1_pkt.c
ssl/d1_srvr.c
ssl/s3_clnt.c
ssl/s3_lib.c
ssl/s3_pkt.c
ssl/s3_srvr.c
ssl/ssl.h
ssl/ssl_lib.c

diff --git a/CHANGES b/CHANGES
index 5cbe876..bd5f02b 100644 (file)
--- a/CHANGES
+++ b/CHANGES
   
  Changes between 1.0.0a and 1.0.1  [xx XXX xxxx]
 
+  *) Permit abbreviated handshakes when renegotiating using the function
+     SSL_renegotiate_abbreviated().
+     [Robin Seggelmann <seggelmann@fh-muenster.de>]
+
   *) Add call to ENGINE_register_all_complete() to
      ENGINE_load_builtin_engines(), so some implementations get used
      automatically instead of needing explicit application support.
index 5bc9eb6..255c19d 100644 (file)
@@ -171,7 +171,7 @@ int dtls1_connect(SSL *s)
                switch(s->state)
                        {
                case SSL_ST_RENEGOTIATE:
-                       s->new_session=1;
+                       s->renegotiate=1;
                        s->state=SSL_ST_CONNECT;
                        s->ctx->stats.sess_connect_renegotiate++;
                        /* break */
@@ -539,6 +539,7 @@ int dtls1_connect(SSL *s)
                        /* else do it later in ssl3_write */
 
                        s->init_num=0;
+                       s->renegotiate=0;
                        s->new_session=0;
 
                        ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
index 1fd58bf..ee67561 100644 (file)
@@ -957,6 +957,7 @@ start:
                        !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) &&
                        !s->s3->renegotiate)
                        {
+                       s->new_session = 1;
                        ssl3_renegotiate(s);
                        if (ssl3_renegotiate_check(s))
                                {
@@ -1163,6 +1164,7 @@ start:
 #else
                        s->state = s->server ? SSL_ST_ACCEPT : SSL_ST_CONNECT;
 #endif
+                       s->renegotiate=1;
                        s->new_session=1;
                        }
                i=s->handshake_func(s);
index 301ceda..ac4fbda 100644 (file)
@@ -177,7 +177,7 @@ int dtls1_accept(SSL *s)
                switch (s->state)
                        {
                case SSL_ST_RENEGOTIATE:
-                       s->new_session=1;
+                       s->renegotiate=1;
                        /* s->state=SSL_ST_ACCEPT; */
 
                case SSL_ST_BEFORE:
@@ -299,7 +299,7 @@ int dtls1_accept(SSL *s)
                        
                case SSL3_ST_SW_SRVR_HELLO_A:
                case SSL3_ST_SW_SRVR_HELLO_B:
-                       s->new_session = 2;
+                       s->renegotiate = 2;
                        dtls1_start_timer(s);
                        ret=dtls1_send_server_hello(s);
                        if (ret <= 0) goto end;
@@ -620,11 +620,12 @@ int dtls1_accept(SSL *s)
 
                        s->init_num=0;
 
-                       if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
+                       if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */
                                {
                                /* actually not necessarily a 'new' session unless
                                 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
                                
+                               s->renegotiate=0;
                                s->new_session=0;
                                
                                ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
index aa5604c..601c2b1 100644 (file)
@@ -207,7 +207,7 @@ int ssl3_connect(SSL *s)
                switch(s->state)
                        {
                case SSL_ST_RENEGOTIATE:
-                       s->new_session=1;
+                       s->renegotiate=1;
                        s->state=SSL_ST_CONNECT;
                        s->ctx->stats.sess_connect_renegotiate++;
                        /* break */
@@ -563,6 +563,7 @@ int ssl3_connect(SSL *s)
                        /* else do it later in ssl3_write */
 
                        s->init_num=0;
+                       s->renegotiate=0;
                        s->new_session=0;
 
                        ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
index 497f64f..c6d4ac1 100644 (file)
@@ -2226,6 +2226,7 @@ void ssl3_clear(SSL *s)
 
        s->packet_length=0;
        s->s3->renegotiate=0;
+       s->s3->new_session=0;
        s->s3->total_renegotiations=0;
        s->s3->num_renegotiations=0;
        s->s3->in_read_app_data=0;
index 08a7233..94ccfa0 100644 (file)
@@ -1280,6 +1280,7 @@ start:
 #else
                        s->state = s->server ? SSL_ST_ACCEPT : SSL_ST_CONNECT;
 #endif
+                       s->renegotiate=1;
                        s->new_session=1;
                        }
                i=s->handshake_func(s);
index 57e516f..c2874e7 100644 (file)
@@ -218,7 +218,7 @@ int ssl3_accept(SSL *s)
                switch (s->state)
                        {
                case SSL_ST_RENEGOTIATE:
-                       s->new_session=1;
+                       s->renegotiate=1;
                        /* s->state=SSL_ST_ACCEPT; */
 
                case SSL_ST_BEFORE:
@@ -316,7 +316,7 @@ int ssl3_accept(SSL *s)
                        ret=ssl3_get_client_hello(s);
                        if (ret <= 0) goto end;
                        
-                       s->new_session = 2;
+                       s->renegotiate = 2;
                        s->state=SSL3_ST_SW_SRVR_HELLO_A;
                        s->init_num=0;
                        break;
@@ -706,11 +706,12 @@ int ssl3_accept(SSL *s)
 
                        s->init_num=0;
 
-                       if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
+                       if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */
                                {
                                /* actually not necessarily a 'new' session unless
                                 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
                                
+                               s->renegotiate=0;
                                s->new_session=0;
                                
                                ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
index 971208b..5a35c67 100644 (file)
--- a/ssl/ssl.h
+++ b/ssl/ssl.h
@@ -1050,12 +1050,14 @@ struct ssl_st
 
        int server;     /* are we the server side? - mostly used by SSL_clear*/
 
-       int new_session;/* 1 if we are to use a new session.
-                        * 2 if we are a server and are inside a handshake
-                        *   (i.e. not just sending a HelloRequest)
-                        * NB: For servers, the 'new' session may actually be a previously
-                        * cached session or even the previous session unless
-                        * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
+       int new_session;/* Generate a new session or reuse an old one.
+                                        * NB: For servers, the 'new' session may actually be a previously
+                                        * cached session or even the previous session unless
+                                        * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
+       int renegotiate;/* 1 if we are renegotiating.
+                                        * 2 if we are a server and are inside a handshake
+                                        *   (i.e. not just sending a HelloRequest) */
+
        int quiet_shutdown;/* don't send shutdown packets */
        int shutdown;   /* we have shut things down, 0x01 sent, 0x02
                         * for received */
@@ -1717,6 +1719,7 @@ STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s);
 
 int SSL_do_handshake(SSL *s);
 int SSL_renegotiate(SSL *s);
+int SSL_renegotiate_abbreviated(SSL *s);
 int SSL_renegotiate_pending(SSL *s);
 int SSL_shutdown(SSL *s);
 
index f59a454..ff71004 100644 (file)
@@ -202,9 +202,9 @@ int SSL_clear(SSL *s)
        * needed because SSL_clear is not called when doing renegotiation) */
        /* This is set if we are doing dynamic renegotiation so keep
         * the old cipher.  It is sort of a SSL_clear_lite :-) */
-       if (s->new_session) return(1);
+       if (s->renegotiate) return(1);
 #else
-       if (s->new_session)
+       if (s->renegotiate)
                {
                SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
                return 0;
@@ -1016,18 +1016,29 @@ int SSL_shutdown(SSL *s)
 
 int SSL_renegotiate(SSL *s)
        {
-       if (s->new_session == 0)
-               {
-               s->new_session=1;
-               }
+       if (s->renegotiate == 0)
+               s->renegotiate=1;
+
+       s->new_session=1;
+
        return(s->method->ssl_renegotiate(s));
        }
 
+int SSL_renegotiate_abbreviated(SSL *s)
+{
+       if (s->renegotiate == 0)
+               s->renegotiate=1;
+       
+       s->new_session=0;
+       
+       return(s->method->ssl_renegotiate(s));
+}
+
 int SSL_renegotiate_pending(SSL *s)
        {
        /* becomes true when negotiation is requested;
         * false again once a handshake has finished */
-       return (s->new_session != 0);
+       return (s->renegotiate != 0);
        }
 
 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
@@ -2649,6 +2660,7 @@ SSL *SSL_dup(SSL *s)
        ret->in_handshake = s->in_handshake;
        ret->handshake_func = s->handshake_func;
        ret->server = s->server;
+       ret->renegotiate = s->renegotiate;
        ret->new_session = s->new_session;
        ret->quiet_shutdown = s->quiet_shutdown;
        ret->shutdown=s->shutdown;